CdS@Cl-TiO_2/(PVDF/SMA/石墨)纤维复合材料的制备与可见光催化水制氢研究

Preparation and photocatalytic hydrogen production of CdS@Cl doped TiO_2/(PVDF/SMA/graphite) composite

以NaCl为Cl源,采用水热法,于聚偏氟乙烯/苯乙烯-顺丁烯二酸酐共聚物/纳米石墨(PVDF/SMA/石墨)电纺纤维表面先后分别负载了Cl-TiO_2和CdS,得到CdS@Cl-TiO_2/(PVDF/SMA/石墨)纤维复合材料。利用SEM、TEM、XRD、XPS、UV-Vis和TGA对复合材料进行了表征。讨论了氙灯模拟太阳光条件下,复合材料催化水制氢的光催化性能。结果表明:CdS@Cl-TiO_2/(PVDF/SMA/石墨)复合材料的平均产氢速度为77.2mL/(h·gcatalyst),且重复利用性好;同等条件下,光催化效率明显优于未掺Cl的复合光催化剂。

The chlorine doped TiO2 and CdS were synthesized on the conducting polymer fiber mat by hydrothermal method successively.The chlorine was came from sodium chloride.The conducting polymer fiber mat was made by electrospinning from polyvinylidene fluoride（PVDF）,styrene-maleic anhydride copolymer（SMA）,and nanographites as conducting fillers.Then the CdS@Cl doped TiO2/（PVDF/SMA）composites were prepared.The as-prepared sample was characterized by scanning electron microscopy（SEM）,high-resolution transmission electron microscopy（TEM）,X-ray diffraction（XRD）,X-ray photoelectron spectroscopy（XPS）,ultraviolet-visible absorption spectra（UV/Vis）,and thermo-gravimetric analysis（TGA）.Under simulated solar light irradiation,a combination of CdS@Cl doped TiO2/conducting polymer was found to be highly efficient for photocatalytic hydrogen evolution from splitting of water.The average photocatalytic hydrogen production efficiency was 77.2mL/（h·gcatalyst）.And it was reusable.It was found that the as-prepared composites demonstrated superior photocatalytic activity to the composite without chlorine.